What it means
A01016 (Firmware changed) is output when the Control Unit (CU) detects that at least one firmware file in the directory on the non-volatile memory — the memory card or the device memory — has been changed illegally compared with the version as shipped from the factory. Depending on how the drive is configured, the same condition can also be issued as a fault.
The alarm value that the drive stores in r2124, read as a decimal number, tells you what exactly is wrong with the firmware files.
Why it appears
- At least one firmware file in the directory on the non-volatile firmware memory (memory card or device memory) no longer matches the version when shipped from the factory — the file was changed illegally.
What to check
- Read r9925 to find out which firmware file the check has found to be incorrect.
- Read r9926 to see the current status of the firmware check.
- Restore the delivery condition of the non-volatile memory that holds the firmware (memory card or device memory).
Reading the message value
- 0 — the checksum of one file is incorrect.
- 1 — a file is missing.
- 2 — there are too many files.
- 3 — the firmware version is incorrect.
- 4 — the checksum of the back-up file is incorrect.
Parameters the manual names
- r2124 (alarm value) — holds the value of this alarm; read it as a decimal number and match it against the list above to identify the reason.
- r9925 (firmware file incorrect) — shows which firmware file is involved.
- r9926 (firmware check status) — shows the status of the firmware check.
Acknowledging and restarting
As an alarm, A01016 triggers no drive reaction and needs no acknowledgement; it clears once the firmware memory has been restored to its delivery condition. If the drive issues the same condition as a fault instead, it reacts with OFF2, and the fault is acknowledged by switching the power supply off and on again (POWER ON).
What differs between the drive families
Straight from the manuals' own fields — A01016 is not described identically everywhere.
| Drive family | Reaction | Acknowledge | Message class | Component | Manual |
|---|---|---|---|---|---|
| G130, G150 | NONE | NONE | Hardware/software error (1) | Control Unit (CU) | SINAMICS G130, G150 List Manual · p. 1374 |
| S120, S150 | NONE | NONE | Hardware/software error (1) | Control Unit (CU) | SINAMICS S120, S150 List Manual · p. 2560 |
| G120 | NONE | NONE | Hardware/software error (1) | — | SINAMICS G120 · p. 821 |
| G120XA | NONE | NONE | — | — | SINAMICS G120XA PN converter · p. 1099 |
The drives this code lives on
A01016 is described for G120, G120XA, G130, G150, S120, S150. These are the converters of those families in our catalogue — price on request.
Questions technicians ask
What does SINAMICS alarm A01016 Firmware changed mean?
The drive has detected that at least one firmware file in the directory on its non-volatile memory (memory card or device memory) was illegally changed compared with the version as shipped from the factory.
How do I fix A01016 on a SINAMICS drive?
Restore the delivery condition of the non-volatile memory used for the firmware. Parameter r9925 shows which file is affected and r9926 shows the status of the firmware check.
What do the alarm values 0 to 4 of A01016 mean?
The alarm value in r2124, read as a decimal number, gives the reason: 0 means the checksum of one file is incorrect, 1 a file is missing, 2 there are too many files, 3 the firmware version is incorrect and 4 the checksum of the back-up file is incorrect.
Does A01016 stop the drive?
Not as an alarm: it triggers no reaction and needs no acknowledgement. If the drive outputs the condition as a fault instead, it reacts with OFF2 and the fault is acknowledged by POWER ON.
Codes next to this one
Source
Written from Siemens' own List Manuals and operating instructions; every number, designation and parameter on this page is checked against them before publication.
All SINAMICS codes: fault and alarm codes · the A01xxx group · SINAMICS manuals · Siemens manuals